Thread: Stats question. is there enough info to answer the question

question: suppose a certain type of factory suffers catastrophic failures in machinary at a rate of 10 per yer. (2 parts) Thanks in advance!

what is the probablility that between 10 and 15 machines inclusive will suffer this failure this year?

What is standard deviation of such failures in a year?

thanks for your help!

is this a binomial dist?

Originally Posted by si4life

question: suppose a certain type of factory suffers catastrophic failures in machinary at a rate of 10 per yer. (2 parts) Thanks in advance!

what is the probablility that between 10 and 15 machines inclusive will suffer this failure this year?

What is standard deviation of such failures in a year?

thanks for your help!

is this a binomial dist?

You're probably meant to assume that the number of catastrophic failures per year follows a Poisson distribution (with a mean of 10).